I have done 400>500kms with the single disc and quite honestly its not too different to the double. I operate shorty Pazzo levers (two fingers) and can still initiate ABS in emergency stop front brake only... It requires about 10% extra force than does the twin disc setup.
Greg.

Awesome! That is very encouraging news!
Have you calculated the weight savings from losing the other Disc/Caliper?

Can you feel any difference at the front in handling, turning?
Best build I've seen on a Tenere'. Hope you get time to wring her out some!